Method for managing commands in command queue, memory control circuit unit and memory storage apparatus

Abstract

A method for managing commands in a command queue, a memory controller, and a memory storage apparatus are provided. The method includes: storing at least one first command in a command queue register according to a plurality of first indication bits and updating the first indication bits according to a current storage status of the command queue register; generating a plurality of updated second indication bits according to the updated first indication bits and a plurality of second indication bits. The method also includes: obtaining at least one first command index corresponding to at least one register block storing the at least one first command in the command queue register according to the updated second indication bits and adding the at least one first command index into a command index register; executing commands corresponding to un-executed command indices in the command queue register.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of Taiwan application serial no. 102123698, filed on Jul. 2, 2013. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.BACKGROUND[0002]1. Technology Field[0003]The present invention relates to a method for managing commands in a command queue, a memory control circuit unit using the method, and a memory storage apparatus using the method.[0004]2. Description of Related Art[0005]Conventionally, data and / or commands are often transmitted between a universal serial bus (USB) mass storage device and a computer host according to a bulk only transport (BOT) protocol. Under the BOT protocol, the USB mass storage device can transmit one command to or receive one command from the computer host at a time, and the next command may be transmitted or received only after the previous command is completely executed.[0006]The BO...

AI Technical Summary

Benefits of technology

The present invention is a method for managing commands in a memory storage apparatus. It helps in effectively managing the commands received from a host system. This method optimizes the use of memory, reduces latency, and improves overall performance of the memory storage apparatus.

Problems solved by technology

The BOT protocol, however, is practically rigid, and the requirements for data processing efficiency and file transmission performance of the USB mass storage device have been increasing.

Notwithstanding the introduction of the USB attached SCSI protocol, there lacks any effective mechanism of integrating the advantages of the USB attached SCSI protocol into the systems and structures of the existing storage media.

Furthermore, citation or identification of any document in this application is not an admission that such document is available as prior art to the invention, or that any reference forms a part of the common general knowledge in the art.

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